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MCS-51 - Wikipedia
Explore Intel’s history- The 8051 Microcontroller
Introduction to 8051 Microcontroller - GeeksforGeeks
8051 Microcontroller Introduction and Basics - Electronics Hub
8051 Datasheet(PDF) - Intel Corporation
A History of Early Microcontrollers, Part 8: The Intel 8051
8051 Microcontroller - Tutorial and Guide - CircuitsToday
Embedded Systems/8051 Microcontroller - Wikibooks
The 8051 Microcontroller Architecture, Programming and Applications ...
Microcontrollers - 8051 Architecture - Online Tutorials Library